i fail to see how because its korda its unsafe
any company in the wrong hands could be deadly , the heli/chod because of the beads is dodgy but the leader its self is fine
i dont use a run ring i just use the swivel on lead (running lead),and its never gets trap on ,if anything after a run it sits above the leader on the knot
the tungsten isnt as bad as some iv seen which is the lead inner wrap and glued on ,which has an end ,which i know is soft lead but could damage a fish if not flush and sticking out .........or even snagg the lead on
iv looked at the beads and i think its because they are too hard that they have proplems ,and when it gets colder they will be worse ...........but the user is in the end responsilbe for the safety of the fish and SHOULD NOT be using a rig they not 100% sure of , simply as